Combination gas-engine-driven air-compressor.



F. M. TITUS.

COMBINATION GAS ENGINE DRIVEN AIR COMPRESSOR. APPLICATION FILED APR.4,19I6.

'1 ,277,779. Patented Sept. 3, 1916,

$ 17+ I if]? I r) y @Inuemto:

UNITED STATES PATENT oFFIoE.

FRANK M. arms, or BRADFORD, PENNSYLVANIA, AssIGNon '10 BLAISDELL moHINEaY COMPANY, or BRADFORD, PENNSYLVANIA, A' CORPORATION.-

ooMiaINA'rIoN GAS-ENGINE-DRIVEN m-oom'rnnsson.

- mamas.

Specification of Letters Patent.

' Patented Sept. 3, 1918.

Application filed April 4, 1916. Serial N 0. 88,939.

To all whom c'tmay concern."

Be it known that I, FRANK M. TrrUs,

' a citizen of the United States, residing at piston for both the gasBradford, in the county of McKean and State of Pennsylvania, haveinvented certain new and useful Improvements in CombinationGas-Engine-Driven Air-Compressors, of which the following is aspecification, reference being had therein to the accompanying drawing.

My invention relates to improvements in combination gas engine drivenair compressors.

The object of my invention is to provide an engine 0t this character inwhich one cylinder is used for the gas engine, and also for compressingthe air and using a single engine and the air compressor. I

Another object of my invention is to provide a compressor ofthis'character in which means is provided for keeping the cylinder andpistons cool, and providing a simple and more effective compressorhaving certain'details of structure and combination of parts hereinaftermore fully set forth.

. In the accompanying drawings:

Figure l is a longitudinal sectional view of my improved air compressor.

Fig. 2 is a sectional view of a modified formof piston. j

Referring now to the drawings, 1 represents a cylinder as shown, and isof an elongated form and surrounded by the water jacket 2, whereby thesame'is kept cool, all

of which is well understood in the art of gas engines and needs nofurther description. The end 3 of the cylinder is closed by a cylinderhead 4 having the usual water jacket 5 communicating with the waterjacket 2, and is provided with the usual spark plug 6, and the gasintake 7 all of which can be arranged in any desired manner as thespecific form of the'spark plug, and also the location of the gas intakeforms no part of this invention. The opposite end of the cylinder isclosed by a cylinder head 8, which like the cylinderhead 4,hasa waterjacket 9 whereby the cylinder is kept cool. The cylinder head has apassage10 leading upwardly through the opening 11, and said openingcommunicates with a passage 16, which is in communication with a pipe 17which leads to the tank into which the comthrough the openings 12,controlle pressed air is to be stored or to any other place desired.Within the passage 16 is a cage 12, which is of a cylindrical form andhas its lower end surrounding the opening 11, and has its upper endprovided with a screw threaded portion 13, screwed into the head 8. Thesaid cage is provided witha series of openings communicating with thepassage 16, whereby the air can pass from the cage. Within the cage is acylindrical valve 14, resting upon the seat 15, carried by the cage 12.Within the cylindrical valve is a coiled spring 12' which has its upperend bearing against a plug 13, screwed upon the threaded portion 13 ofthe cage, The cylindrical head 8 isprovided with another set of valves18 which communicates with the cylinder through the passage 19, andcommunicates with the space 20 which is in communication withthe'outside atmosphere,

whereby the end of the cylinder is supplied with air, later to bedescribed. The valves l8 areof a rotary form and-s0 arranged that theyare closed when the piston is movingtoward the head 8, by which they arecarried so that the air cannot pass out the end of the cylinder but mustpass upwardly by the valve 11.

The cylinder head 8 is provided with a stufiing box -21 through whichthe piston rod 22 passes. This piston rod extends outwardly and isconnected through a crosshead and connecting rod to a crank carried by ashaft and on which is arranged the usual fly wheel for balancing theengine. The piston rod 22 within the cylinder 1 is provided with the twopistons 23 and 24 arranged some distance apart and held on the pistonrod in said spaced relation. These pistons may be of any desiredstructure and provided with the usual piston rings 25, all

of which is well understood and needs no description. Communicating witha cylinder between the pistons 23 and 2a are the 45 a through theexhaust exhaust ports 26 are uncovered just as the piston reaches itslimit of outward stroke,

and remain uncovered while the crank to which the piston rod isconnected is on dead center and allows for the proper exhausting of theburnt gases in the cylinder.

Instead of making the pistons 23 and 24 separate and connecting them tothe piston rod 22, as shown in the drawings, the same can be made in onepiece and formed of the two pistons 28 and 29 rigidlyconnected by thesleeve 30 and through which the reduced portion 31' of the fully shownin Fig. 2 of the drawings.

The operation of my device is as follows The sparking mechanism is sotimed that when the piston 24 reaches its limit of movement to the leftin the cylinder, an explosion takes place and forces the piston to theright working against the piston 24. The piston 23 during this movementis compressing the air within the space to the right thereof, and

compressed air is forced outwardly through thus when the air passage 27is opened, a-

large amount of fresh air is drawn into the space between the pistons 23and 24 and the pistons kept comparatively cool by said cool The vacuumis caused in the following manner. The piston 24 moves to the rightunder the force of the explosion and after it has opened the ports 26 bypassing the same, the exhaust gases pass out therethrough into theexhaust pipe 32. After the gases have left the cylinder, but are stillpassing pipe 32, the port 27 is uncovered by reversemovement of thepiston 24 to the right and thus both ports'26 the exhaust through theand 27 are ,open at thesame time for a short per od. The exhaust gasespassing through pipe 32 create a suction all through the pipe whichsuction is felt in the space between the. pistons 23 and 24, thesamebeing in communication therewith ports 26. The suction or vacuum inthe space between'the pistons 23 and 24 draws a great volume of cool airtherein through the with the atmosphere. When the pistons .have reachedtheir movement to the right,

, they again travel backwardly to the left, the passa and ge and theexplosive charge is compremed within the cylinder between thecylnderhead 4 and the piston 24. The charge is exploded and the pistontravels again to piston rod 22 passes as port 27, whichcommunicatesopposite si de .of the piston,

the right, and the same operation takes place. By this construction andarrangement of parts,'it will be seen that through the opening of theexhaust openings inadvance of the air inlet openings 27 a vacuum iscaused between the pistons 23 and 24, and when the piston 23 has passedthe air inlet port openings 27 the said vacuum draws in a great amountof fresh cool air, and both aid in cooling the pistons and cylinders.

Having thus described my invention what I claim and desire to secure byLetters Patent is:

1. An air compressor of the character described, comprising a cylinder,a piston reciprocatably mounted therein and having a circumferentialchamber in its outer periphery, an exhaust port and an air inlet port,the said ports arranged whereby the move? ment of the piston throws theminto communication intermitttently with the chamber of said piston.

An air compressor of the character described, comprisin g a cylinder, apiston having acircumferential chamber in its outer peripheryreciprocatably mounted within the cylinder, means for exploding a chargeof gas on one side of the piston, means for compressing air on theopposite side of the piston, exhaust ports adapted to communi cateintermittently with the chamber in the piston, and an air port adaptedto communicate with the said space whereby the exhaust I causes a vacuumtherein to draw fresh air into the chamber in the piston for cooling thesame.

3. An air compressor, inder, a piston having chamber in its outercomprising a cyla circumferential periphery reciprocatably mounted inthe cylinder, means for exploding a charge of gas on one side of thepiston, means for compressing air on the other side ofthe piston,exhaust ports for the explosiv end of the cylinder and,

adapted to communicate intermittently with the chamber in the piston,and an air intake communicating with the chamber in the piston, wherebythe exhaust causes a vacuum within the chamber in'the piston, andwhereby when the said airintake is uncovered by the piston, cool air isdrawn inwardly by the vacuum into the chamber in the piston for coolingthe same.

' 4. An air compressor com ising a cylinder having both ends close apiston rod extending through one end of the cylinder,

.a piston carried by the piston rod and formedof two spaced members,means for exploding the charge of gas on one side of the piston, meansfor compressing air on the adapted to communicate with the space betweenthe two members of the piston, and an air port adapted to communicateintermittently with the said space whereby the exexhaust ports haustcauses a vacuum therein to draw fresh air between the members of thepiston for cooling the same.

5. An air compressor comprising an elon-' gated cylinder having bothends closed, a piston rod extending the cylinder, a piston carried bythe piston rod and formed of twospaced members engaging the innerperiphery of the cylinder, means for exploding a charge of gas on oneside of the piston, means for compressing air on the opposite side ofthe piston, exhaust ports for the explosive end of the cylinder andadapted to communicate intermittently with the space'between the twomembers of the piston, and an air intake communicating with the spacebetween the two members of the piston, whereby the exhaust causes avacuum within the space between the two members of the piston, wherebywhen the air intake is uncovered by one member of the piston, cool airis drawn inwardly by the through one end of 1 side of the piston,

vacuum for cooling the two members of the piston.

6. An air compressor of the character described, comprising a cylinder,a piston hav-' periphery and reciprocating in the cylinder, means forexploding a charge of gas on one means for compressing air on theopposite haust ports adapted at one time to com- "ing a circumferentialchamber in its outer side of'the piston, ex-

municate with the chamber in the piston,

and an air port communicating with the chamber in the piston at the sametime the exhaust port is communicating therewith whereby the exhaustcauses a vacuum in the chamberto draw fresh air intothe same.

' In testimony whereof Ihereunto afiix my signature in the presence oftwo witnesses.

' I FRANK M. TITUS.

Witnesses:

HERMAN H. Non'rrr,

' CHAS. F. GENTHUER.

